Creasing means for sewing-machines.



.No. 722,497. v PATBNTED MAR. 10, 1903. G. H. ,DIMOND, W. F. DIAL & W. R. ABEROROMBIE. OREASING MEANS FOR SEW-I-"NG MACHINES.

. APPLICATION FILED OUT. 15, 1901.

N0 MODEL. 4 SHEETS-SHEET 1.

W/ TNESSE VE N 7055 Mow/WWW No. 722,497. P'ATEN-TED MAR. 10, 1903.

G. H. DIMOND, W.F. DIAL & W. R. ABERGROMBIE. GREASING MEANS FOR SEWING MACHINES.

APPLICATION FILED OUT. 15, 1901.

H0 MODEL.

4 SHEETS-SHEET 2.

IN VE N T0195 f Wm I 10 MODEL.

PATENTED MAR. 10,1903.

G. H. DIMOND, W. I. DIAL & W. R. ABERGROMBIB.

GREASING MEANS FOR SEWING MACHINES.

APPLICATION FILED OCT. 15, 1901.

4 SHEETS-SHEET if.

m: "ORR s FEYER! co. Mom-Lima. WAHINHTON D- c.

No. 722,497. A PATENTED MAR. 10, 1903. G.H. DIMOND, W. P. DIAL & W. R. ABERGROMBIB. GREASING MEANS FOR SEWING MACHINES.

APPLICATION FILED 001'. 15,1901. 10 MODEL. 4 sums-sun 4- I w/r/vessgs Qua/MM MZWWYM ZMW UNITED STATES GEORGE H. DIMOND, WILBUR F. DI OF BRIDGEPORT, CONNECTICUT,

AL, AND WILLIAM E. ABEROROMBIE, ASSIGNORS TO WHEELER & WILSON MANUFACTURING COMPANY, OF BRIDGEPORT, CONNECTICUT, A COR- PORATION OF CONNECTICUT.

CREASING MEANS FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 722,497, dated March 10, 1903. Application filed October 15, 1901. Serial No. 78,723. (No model.)

To aZZ whom it may concern.-

Be it known that we, GEORGE H. DIMOND, WILBUR F. DIAL, and WILLIAM R. ABER- CROMBIE, citizens of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have invented a certain new and useful Improvement in Sewing-Machines, of which the followingis a full, clear, and exact description.

The object of this invention is to provide a sewing-machine for the more perfect and expeditious production of ornamentation on fabrics, one illustration of which may be found in what is known as air-cording.

Theinvention consists in a former or creaser made as a sort of blunt-edge blade and actuated to raise the material into a ridge or fold between parallel needles, each needle having an individual upper-thread supply and a common under-thread supply.

We have herein shown and described two forms of our invention, in each of which there is a former or creaser adapted to be projected up through the throat-plate periodically to raise the material into a fold or ridge previous to or during the formation of parallel lines of stitches adjacent to the fold or ridge.

By our invention the quality of the work is improved and the turning of short curves is greatly facilitated. I

In practical application the mechanism of this invention is an attachment capable of use on a great variety of sewing-machines without any or any very material changes in their construction, and hence the invention is not limited to the two kinds of machines herein selected for illustration of its principle.

In the accompanying drawings, illustrating our invention, in the several figures of which like parts are similarly designated, Figure 1 is an inverted plan view of a sewing-machine equipped with our improvement. Fig. 2 is a cross-section taken in the plane of the line A A of Fig. 1. Fig. 3 is a perspective view of a portion of a sewing-machine bed-plate, together with our improved structure, in proper relative position, the distance between the needles, and likewise the needle-holes in the presser-foot, being somewhat exaggerated for the purpose of clearer illustration. Fig. 4 is a detail perspective view of the feed -bar equipped in'accordance with our invention. Fig. 5 is a detail perspective view of the creaser or former upon which the materialis shaped. Fig. 6 is a detail perspective view of the presser foot inverted. Fig. 7 is a broken plan view illustrating the character of work for which our improvement is adapted. Fig. 8 is an enlarged cross-section through one of the seams made with our device. Fig. 9 is an inverted plan view, similar to Fig. l, but illustrating a modified form of our invention. Fig lO is a cross-section taken in the plane indicated by the line B B on Fig. 9. Fig. 11 is a detail perspective view of the creaser-operating parts shown in Figs. 9 and 10 removed from the machine, and Fig. 12 is a perspective view of the throat-plate through which the creaser is adapted to protrude.

In describing our improvement only such limited reference will be made to the wellknown parts of a sewing-machine as is deemed necessary to a proper understanding of our invention, and in the drawings we have likewise illustrated only those portions of the machines with which our structure is directly associated.

We have illustrated our invention in connection with the well-known Wheeler & Wilson transverse-hook machine; but of course it will be understood that our invention is applicable to other varieties of machines equally well. 4

l is the bed-plate, and 2 3, respectively, the usual feed rock-shafts suitably journaled beneath said bed-plate and actuated in the usual or any approved manner.

Referring specially to Figs. 1 to 8, 4 is the feed-bar, one end of which is pivotally connected to the end of a vertically-disposed arm 5, rigid with the rock-shaft 2, while the other end slides within a block 6, mounted on the end of the horizontally-disposed arm 7, extending from the rock-shaft 3. 8 is a coiled spring, one end of which is secured to a part of the bed-plate, while the other end is attached to the feed-bar 4, the tendency of said spring. being to keep the feed-bar pressed against the block 6.

The above-mentioned parts are of the ordi nary or any approved construction and are common to four-motion-feed sewing-machines.

9 is a former or creaser secured upon the feed-bar by screws 10. The free end of said former or creaser 9 projects through an aperture 11, formed in the throat-plate 12 and extends, preferably, between the needles 13 when the latter are in lowered position. The screws also serve to secure the feed-dog 14 upon the feed-bar, said dog being placed directly over the heel end of the creaser. The feed-dog 14 and creaser 9, if desired, may be formed integral; but for convenience in manufacturing we prefer to make them separate.

15 is a presser-bar of the usual construction, and secured to said bar is a presser-foot 16, the under side of which has a groove 17, extending in a direction parallel with the line of the feed of the material, the forward or entrance end of the groove being flared, as shown at 18, to afiord easy ingress of the material. The heel end of the presser-foot is also round- 61 outwardly from the groove, as seen at 19, to facilitate turning the material upon curves of short radii.

represents the needle-holes in the presserfoot upon opposite sides of the groove.

21 is the loop-taker or hook of any suitable construction and driven in the usual or any approved manner.

The material is fed between the presserfoot and throat-plate in the usual manner, the creaser and groove in the under side of the presser-foot cooperating to form a ridge or fold in the material, as shown in Figs. 7 and 8, which has the appearance of being corded. The lines of stitching on either side of the ridge, which are formed by two separate upper threads and a single under or bobbin thread, serve to keep the ridge in shape, this mode of stitching being so well known in the art that afurther explanation is deemed unnecessary. By carrying the creaser upon the feed-bar with the feed-dog said creaser is necessarily withdrawn from the groove in the p'resser-foot when the feed-bar is lowered, thereby permitting the material to be turned much easier and facilitating the rounding of curves of short radii-a result hitherto not practically obtainable.

The modified construction shown in Figs. 9 to 12, inclusive, is especially adapted to machines equipped with a wheel feed or an upper or needle feed, since the movements of the creaser therein are controlled entirely independently of the feed mechanism; but we have elected to illustrate said modification in connection with a machine of the same class as that to which our first-described form is applied. In this modification 22 is the hook-driving shaft, journaled in suitable bearings beneath the bed-plate 1, from which motion is transmitted to the hook or looptaker 21 in the usual or any approved manner. 24 is a rock-shaft journaled in suitable bearings 25 26 and carrying a lever 27, rigid therewith, the free end of which bears upon the periphery of a cam 28, tight on the hookdriving shaft 22. The hub of the lever 27 is somewhat elongated and bears against the face of the bearing 26, and adjacent to the opposite face of said bearing is a collar 29, tight on the end of the shaft '24, by means of which collar and hub said shaft is held against lateral shifting. 30 is a coiled spring wound around the shaft 24, one end of said spring being held against turning by abutting against the under side of the bed-plate, the other end being bent over on top of the lever 27 to keep the latter pressed against the periphery of the cam 28. 31 is a horizontallydisposedarm secured by a pinch-screw 32 upon the end of the rock-shaft 24: adjacent to the loop-taking mechanism. Upon the free end of the arm 31 is secured, by means of screws 33 or otherwise, the former or creaser 34, which projects through an aperture 11 in the throat-plate 12, similarly to the former or creaser 9 in our first-described construction. From the foregoing it will be clear that as the shaft 22 is rotated the cam 28 will impart an oscillatory movement to the rock-shaft 24:, which through the horizontally-disposed arm 31 will eifect an approximately vertical movement of the former or creaser 34, the latter being thereby alternately protruded and re tracted through an aperture 11 in the throatplate, the extent of such movement being primarily governed by the contour of the cam 28. By manipulating the pinch-screw 32 the arm 31 may be adjusted upon the shaft 24 to alter the height which the free end of the creaser 34. protrudes above thethroat-plate. The timing of the cam 28 is such that the creaser 34 will be in elevated position just before the needles pierce the material and in lowered position previous to the feeding with the needles out of the material, such timing insuring the needles piercing the material when the latter is in proper shape around the creaser and also facilitating the turning of the material, which is accomplished when the needles are out of the goods and the creaser is in lowered position.

The invention is not limited to the use of two needles and a single under thread.

Parts shown in the drawings accompanying this specification and not specifically described, such as the bevel-gearing, may be of any approved construction and such as used in the Wheeler &; Wilson sewing-machine hereinbefore referred to.

What we claim is-- 1. In a sewing-machine, a stitch-forming mechanism, including a plurality of needles and as many threads, and a single under or shuttle thread, for the formation of parallel lines of stitches, in combination with a former, and means for imparting to said former snb- IIO stantially vertical movements for efiecting a fold of the material between the parallel lines of stitches, substantially as described.

2. In a sewing-machine, a stitch-forming mechanism, including a plurality of needles and as many threads, and a single under or shuttle thread, for the formation of parallel lines of stitches, in combination with a clothfeeding mechanism, a former, and means for imparting to said former substantially vertical movements for effecting a fold of the material between the parallel lines of stitches, substantially as described.

3. In a sewing-machine, a stitch-forming mechanism, including a plurality of needles, and a single under or shuttle thread for the formation of parallel lines of stitches, in combination with a cloth-feeding mechanism and a vertically-actuated former, said former mounted and controlled independently of the cloth-feeding mechanism, for effecting a fold of the material between the parallel lines of stitches, substantially as described.

4. In a sewing-machine, the combination of means for forming parallel lines of stitches, including a plurality of needles and as many threads and a single under thread, and clothfeeding mechanism, with a grooved presserfoot, a slotted throat-plate, a former, and automatic means for vertically moving said former into and out of the slotted throatplate and grooved presser-foot and cooperating with said presser-foot to shape the material between the lines of stitches, substantially as described.

5. Ina sewing-machine, the combination of means for forming parallel lines of stitches, including a plurality of needles and as many threads and a single under thread, and clothfeeding mechanism, with a throat-plate having an aperture therein, a former, means alternately to project and retract said former through said aperture, and a presser-foot, whereby the cloth is raised into a fold or ridge between the parallel lines of stitches as the stitching progresses.

6. In a sewing-machine, the combination of stitch-forming mechanism, including a plurality of needles and means to lock their threads to form parallel lines of stitches, means for feeding the material, means to support the material, a former, and means to impart substantially vertical movements to said former and thereby project it between adjacent needles to form a continuous fold or ridge in the material between the parallel lines of stitches, substantially as described.

7. In a sewingmachine, stitchforming mechanism including a plurality of needles and means to lock their threads, for forming parallel lines of stitches, means for feeding the material, and a support for the material, combined with a former, a cooperating presser-foot, and automatic means to actuate the former to raise it just before the needles pierce the material, to form a continuous ridge or fold in the material between the parallel lines of stitches, and to lower it prior to the feeding of the material and while the needles are out of the material, substantially as described.

In testimony whereof we have hereunto set our hands this 14th day of October,A. D. 1901.

GEORGE H. DIMOND. WILBUR F. DIAL. WILLIAM R. ABERCROMBIE.

Witnesses:

ISAAC HOLDEN, FRANK M. WOOTTON. 

